Datenblatt für WS2812 von Adafruit Industries LLC

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WS2812
IntelligentcontrolLED
integratedlightsource
http://www.world-semi.com
FeaturesandBenefits
lControlcircuitandRGBchipareintegratedinapackageof5050components,formacompletecontrolofpixel
point.
lBuilt-insignalreshapingcircuit,afterwavereshapingtothenextdriver,ensurewave-formdistortionnot
accumulate.
lBuilt-inelectricresetcircuitandpowerlostresetcircuit.
lEachpixelofthethreeprimarycolorcanachieve256brightnessdisplay,completed16777216colorfullcolor
display,andscanfrequencynotlessthan400Hz/s.
lCascadingporttransmissionsignalbysingleline.
lAnytwopointthedistancemorethan5mtransmissionsignalwithoutanyincreasecircuit.
lWhentherefreshrateis30fps,lowspeedmodelcascadenumberarenotlessthan512points,highspeedmodenot
lessthan1024points.
lSenddataatspeedsof800Kbps.
lThecolorofthelightwerehighlyconsistent,cost-effective..
Applications
lFull-colormodule,Fullcolorsoftlightsalampstrip.
lLEDdecorativelighting,Indoor/outdoorLEDvideoirregularscreen.
Generaldescription
WS2812isaintelligentcontrolLEDlightsourcethatthecontrolcircuitandRGBchipareintegratedin
apackageof5050components.Itinternalincludeintelligentdigitalportdatalatchandsignalreshapingamplif
icationdrivecircuit.Alsoincludeaprecisioninternaloscillatoranda12Vvoltageprogrammableconstantcurre
-ntcontrolpart,effectivelyensuringthepixelpointlightcolorheightconsistent.
ThedatatransferprotocolusesingleNZRcommunicationmode.Afterthepixelpower-onreset,theDIN
portreceivedatafromcontroller,thefirstpixelcollectinitial24bitdatathensenttotheinternaldatalatch,
theotherdatawhichreshapingbytheinternalsignalreshapingamplificationcircuitsenttothenextcascade
pixelthroughtheDOport.Aftertransmissionforeachpixel，thesignaltoreduce24bit.pixeladoptautoresha
-pingtransmittechnology,makingthepixelcascadenumberisnotlimitedthesignaltransmission,onlydepend
onthespeedofsignaltransmission.
LEDwithlowdrivingvoltage,environmentalprotectionandenergysaving,highbrightness,scatteringangl
eislarge,goodconsistency,lowpower,longlifeandotheradvantages.ThecontrolchipintegratedinLED
abovebecomingmoresimplecircuit,smallvolume,convenientinstallation.
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WS2812
IntelligentcontrolLED
integratedlightsource
http://www.world-semi.com
MechanicalDimensions
PINconfiguration
PINfunction
NO.SymbolFunctiondescription
1DOUTControldatasignaloutput
2DINControldatasignalinput
3VCCPowersupplycontrolcircuit
4NC
5VDDPowersupplyLED
6VSSGround
AbsoluteMaximumRatings
Worldsemi httE://www. world-semi. com
WS2812
IntelligentcontrolLED
integratedlightsource
http://www.world-semi.com
PrameterSymbolRatingsUnit
PowersupplyvoltageVCC+6.0~+7.0V
PowersupplyvoltageVDD+6.0~+7.0V
InputvoltageVI-0.5～VDD+0.5V
Operationjunction
temperatureTopt-25～+80℃
StoragetemperaturerangeTstg-55~+150℃
ElectricalCharacteristics（TA=-20～+70℃，VDD=4.5～5.5V,VSS=0V ,unlessotherwisespecified）
PrameterSmybolconditionsMinTpyMaxUnit
Lowvoltageoutput
current
IOLROUT——18.5——mA
IdoutVo=0.4V，DOUT10————mA
InputcurrentIIVI=VDD/VSS————±1µA
Inputvoltagelevel
VIHDIN，SET0.7VDD————V
VILDIN，SET————0.3VDDV
HysteresisvoltageVHDIN，SET——0.35——V
Switchingcharacteristics（TA=-20～+70℃，VDD=4.5～5.5V ,VSS=0V ,unlessotherwisespecified）
PrameterSymbolConditionMinTpyMaxUnit
OperationfrequencyFosc2————800——KHz
Transmissiondelay
timetPLZCL=15pF,DIN→
DOUT,RL=10KΩ————300ns
FalltimetTHZCL=300pF,OUTR/OU
TG/OUTB————120µs
Datatransmission
rateFMAXDutyratio50%400————Kbps
InputcapcityCI——————15pF
Worldsemi httE://www. world-semi. com
WS2812
IntelligentcontrolLED
integratedlightsource
http://www.world-semi.com
LEDcharacteristicparameter
EmittingcolorWavelength(nm)Luminousintensity(mcd)Current(mA)Voltage(V)
Red620-630550-700201.8-2.2
Green515-5301100-1400203.0-3.2
Blue465-475200-400203.2-3.4
Datatransfertime(TH+TL=1.25µs±600ns)
T0H0code,highvoltagetime0.35us±150ns
T1H1code,highvoltagetime0.7us±150ns
T0L0code,lowvoltagetime0.8us±150ns
T1L1code,lowvoltagetime0.6us±150ns
RESlowvoltagetimeAbove50µs
Sequencechart:
0 c o d e
1 c o d e
R E T c o d e
T 0 H
T 0 L
T 1 H
T 1 L
T r e s e t
Cascademethod:
D I N D I N D I ND O D O D O
P I X 1
D 1
D 2
D 3
D 4
P I X 2
P I X 3
Worldsemi http://www. world-semi. com
WS2812
IntelligentcontrolLED
integratedlightsource
http://www.world-semi.com
Datatransmissionmethod：
Note:ThedataofD1issendbyMCU,andD2,D3,D4throughpixelinternalreshapingamplificationto
transmit.
Compositionof24bitdata:
G7G6G5G4G3G2G1G0R7R6R5R4R3R2R1R0B7B6B5B4B3B2B1B0
Note:FollowtheorderofGRBtosentdataandthehighbitsentatfirst.
Typicalapplicationcircuit:
D a t a r e f r e s h c y c l e 1
D a t a r e f r e s h c y c l e 2
f i r s t 2 4 b i t
s e c o n d
2 4 b i t
t h i r d 2 4 b i t
f i r s t 2 4 b i t
s e c o n d
2 4 b i t
t h i r d 2 4 b i t
s e c o n d
2 4 b i t
t h i r d 2 4 b i t
s e c o n d
2 4 b i t
t h i r d 2 4 b i t
t h i r d 2 4 b i t t h i r d 2 4 b i t
D 1
D 2
D 3
D 4
r e s e t c o d e
> = 5 0 u s
r e s e t
c o d e